The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 1990
Filed:
Oct. 07, 1988
Applicant:
Inventor:
Noboru Aoyama, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01P / ;
U.S. Cl.
CPC ...
324173 ; 324163 ; 360 7806 ; 369239 ; 369221 ;
Abstract
Apparatus for detecting the speed of a moving object when exposed to primary magnetic flux fields and secondary external magnetic flux fields. The apparatus includes a magnetic device which generates the primary magnetic flux fields, a multi-coil device which carries induced electric currents when exposed to the primary magnetic flux field, and an error correction circuit for offsetting the effect of the magnetic flux from the external magnetic flux sources on the induced electric current. A support device is positioned between the multi-coil device and the magnetic device to allow relative movement therebetween, corresponding to the movement of the object.